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Chemical durability, electrical and dielectric properties of the ternary system (50-x)K2O???xMnO???50P2O5 phosphate glasses

Author(s): El Moudane M

Potassium phosphate glasses containing MnO ranging from 20 to 35 mol % have been synthesized using melt-quenching method. The amorphous nature of the samples was confirmed by XRD. The chemical durability of these studied glasses increases with MnO content. Glasses having more than 30 mol% MnO had an excellent chemical durability. The electrical and dielectric parameters were measured in the frequency range from 10 KHz to 1 MHz in the temperature range from room temperature to 550°C. It was observed that the values of ac conductivity increase with frequency. The conductivity of all the glasses increases with temperature following the Arrhenius law. Activation energy was found to increase with raise in amount of manganese oxide and decrease with the frequency. It was also observed that the values of dielectric constant and loss factor enhance and decrease respectively with increasing temperature and frequency. These results agree with a closer structure and act in a manner that manganese enters the glassy matrix as a network former character.

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  • Geneva Foundation for Medical Education and Research

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